Requests that miss the same variant while its fetch is held must make
one fetch and one transcode between them, all get the same image and
each count one miss. Variants differing only in quality or fit stay
apart. A waiting request whose context ends returns at once; the first
request's client leaving does not stop the work. A shared failure
reaches every request, the negative cache answers the next one, and an
uncached failure is fetched again. A request that has already ended
fetches nothing, and a panic comes back as an error. All but the
variants test fail on next.
Model: opus-5-5
clawbot
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